Lamp-socket.



G. F. RUSH.

LAMP SOCKET.

APPLICATION FILED JUNE 13, 191s.'r

1,106,974. Y Patented Aug. 11, 19145 il Be' it knownlt at I, GEORGE Fmnnion strarns rnrENT.

ommen rnnnnmicir Russi., or offrendo, kinn'inors.

Specification of `Letters Patent. v

Patented Aug; 11,1914.

f Mumien mea :une 1a, 1913. seriaimm'zam.

To all 'whom-time concern.'

1 Rsri, a citizen yoli the United States,resid -ing.=at-Chicago, in the, county of Cook and vice .of unusually State of Illinois, have invented a ,certain new .and useful Improvement .in Lampf Sockets, of which the fbllowing is a specification.. y

:This invention relates to 'electric lamp .socketsand its object is to provide such ade# neat appearance and corny lindrical metallic lamp yreceiving shell is secured 'to an insulating base by very :simple rictional means Without the aidfo other fastening parts. e

The invention also consistsin details of c struction vvhich will be'more fully set verted plan view of the forth hereafter. l v ,e A In the drawings, Figure 1 1s a vert-ical Asectional view .through a. mechanism which illustrates this invention in 'its preferred form, Fig. 2 is a' top planview o"I`- the partsillustra'ted in Fig. 1. Fig. Sis an insame parts. Fig. 4 is a plan view ofthe metallic shell member removed from th'e'base. Fig. 5 is a bottom i' plan Viewof the central terminal, for a lamp l to be inserted in the socket, the same taken .ection or lug out from the central portionof'the parts illustrated in Fig. 3. Fig. 6` illustrates a modified form of the tubular member.

"In constructing the preferred form of this device, a cylindrical base member 10 of insulating material is provided, preferably closed atvone end by a bottom 12 i'itegral therewith, the opposite end being provided, if desired, with a flange .14 for any desired purpose. The base, therefore, closely resembles` a'cup having sides 1 0 and a bot,- torn 12. s

Extending inside ofthe base member 10 from the bottom 12 thereof i's a central pro- 16 through which is van openin or recess 18 for the usual central termina of the socket terminating in a central 'contact located-in recess 2O Within the main socket. yThis central terminal and its details are well known in the art and of itself forms'no part of this invention. The outer Wall of the .central projecting lug 16, 1s preferably provided with a serres of circumferentialjnotches22- iuting, and the inte- Ariorcylindrical wall 24 of the-base memberf 10`is.- preferably left in'a more or less rough cned condition when made. Inside of this base member 10 is inserted the usual cylindrical metallic terminal shell 26 provided shown, for engagementfby the threadson lthe outside of the'electric lamp stem which 1s to be inserted therein-fin the ordinary '-nianner. j This is in 'other Words, in thesel particulars, the standard shell of commerce.

This standard metallic' shell 26 is secured in y position in the base 10..preferably by pro'- viding upon-its lower outer circumterence a plurality of 'outwardly turned teeth 30 engaging the' interior wall 24 .of the base and preferably also, by providing a plurality of inwardly turned teeth 32 extending to.

Ward and engaging the.central lug 16 'in the. notches "22, heretofore described. The

.tubular member or shell 26 is preferablyl made of spring'metal v'so that the inwardly turned teeth 32 and the outwardly turned' vteeth 30 are in fact springs which through lthis "fact `forcibly engage the respective parts of the insulating base. The forms of these spring members may be -varied Without departing' vfrom the invention. `They may even be made as one continuous flange around and a part of the shell 26, see flange 30, Fig. 6.

. onits circumference with screw threads, as' 4 In the construction ofthe device, the base and the central shell member 26 are, of course, made'separately. Then the shell is inserted inside the base to the position shown in Fig; 1 in which position the sets of teeth 30 and 32 frictionally engage the base and thus `retainand secure the shell 26 in position as shown, without the aid of l.other securing` fdevices. A

' Electricity isconducted to the internal cylindrical shell 26 through a wire, not shown, which' passes throu h a hole 34 provided for the purpose in t e base, said wire being soldered to the shell 26 before the parts are assembled, and shoved through said hole 34 simultaneously with the insertion of the shell 26, as heretofore described. Having thus described my invent-ion, what I claim as new and desire to' secure byl Letters Patent is: e Y

1 .A lamp socket device including a hollow. base member having a recess therein, a tubular shell of less diameter than the recess in the base inserted in said recess said `shell havin ont'one prtion otvvardlyv shellV inserted in saidnopening .in the base,'2'5` pointed teet yWhose Vouter endsl lie in` a 'said shell being of a diameter intermediate eurve of normally greater diameter than the between the base and'lug and formed .with l interior of the'base so that IWhen the shell inwardly turned teeth at one end .adjacent 5 is inserted in the bas e,'the` teeth frictionally to the lug and outwardly turned teeth at press 'against thewall ofthe base t hold the opposite end extending toward the base, 30 the-shell thereiny A Y' the 'diameter ofthe opening inclosed by the 2. A- lamp socket deviee including a hol- 'points of t e inwardly' turned teeth being low base member of insulating: material ha'y- .normally less than the diameter of the lug .loing-a recess therein, .la tubular 'metallic shell.rand the diameter of -the curve on lwhich of less diameter thanthe recess in the base,l points of the outwardly turned teeth lie, be- 35 anfd of suitable length tobeinsertedr-whollying 'normally greater than the diameter of insidejthebase, .having on onevend outf Ythe opening in the' base, whereby the rewardly pointed teeth .whoseouterends liein spective sets'ofteeth frictionally engage-the "15 'a curve of normally greater diameter than ldug and thebase respe'ctively'and thus hold the interiorzof the ibase'4 so tha/*when lthe the shell' in place upon .thebaseiv f 10 shell is inserted in the base, the teeth fi'ic- In Witness whereof, Ihatevhereunto sub. 'if ftional'ly press against the wall ofthe base scribed my name in the presence of two Wit-r A to hold the1 dshell tlfiexllein-.l bea l nesses. 20 3. naevice'o teeafssdescri ,ecu` .f f ""-shapedbase member. .ofinsulating materiell' GEORGE FREDERICK RUb-H having 'a cylindrical .opening therein, e'en- VVitnesses':l tral' 1u projecting'from the .interior ofthe DWIGHT B. CHEEVER, base-o tbf'up; and'aecylindrical metallic" ,MAX S. RosENzwnrG.

'opia'e of thin patent maybe obtaine'diar va cents each, by addressing the Oemmuloner offratenta,

" i Washingtdmnc." 

